Turkey facing international isolation as US warns coup crackdown could threaten Nato membership

Turkey has been warned it could face international isolation, including suspension from Nato, as world leaders told the country’s authoritarian president not to overplay his hand after the failed coup.

Following a night of long knives which saw thousands arrested or dismissed from their posts on suspicion of involvement in the putsch, John Kerry, the US secretary of state, led calls from both the US and the EU for restraint.